Doing some quick math, the maximum weight a robot could be is 1325.5 lbs, based on a 17.5x17.5x17.5 cube built entirely from vex metal plates. Weight could be increased if you shoved axles in all the holes. But to be legal, you’d have to remove some of the steel to make room for the V5 brain and battery (required by R1 subsystem 2), and that would reduce the weight a bit.